Silver-Prussian-blue-loaded nitrogen-doped graphene composite material and preparation method and application thereof

A nitrogen-doped graphene and Prussian blue technology is applied in the field of electrochemical detection, which can solve the problems of high detection limit and low detection limit of sodium nitrite, and achieves low detection limit, good storage stability, and high detection limit. wide range of effects
CN110426433AActive Publication Date: 2019-11-08湖南角山米业有限责任公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
湖南角山米业有限责任公司
Publication Date
2019-11-08

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Abstract

The invention discloses a silver-Prussian-blue-loaded nitrogen-doped graphene composite material and a preparation method and application thereof. The preparation method comprises the following stepsof adding concentrated hydrochloric acid, deionized water and N-N-dimethylformamide into K3[Fe(CN)6] for a reaction in a reaction kettle to obtain Prussian blue; dispersing the Prussian blue in deionized water, adding glucose, and stirring the mixture to obtain a Prussian blue dispersion; adding a silver ammonia solution into the Prussian blue dispersion, heating the mixture through a water bath,and performing standing; separating and washing products to obtain a silver-Prussian blue material; adding the silver-Prussian blue material into N,N-dimethylformamide-dispersed nitrogen-doped graphene to obtain the silver-Prussian-blue-loaded nitrogen-doped graphene composite material. A chemically modified electrode prepared from the silver-Prussian-blue-loaded nitrogen-doped graphene compositematerial can be used for quickly detecting sodium nitrite in food and has the advantages of wide detection range, low detection limit, simple operation and the like.
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Description

technical field

[0001] The invention relates to the technical field of electrochemical detection, in particular to a nitrogen-doped graphene composite material supported by silver-Prussian blue and its preparation method and application. Background technique

[0002] Sodium nitrite is commonly known as nitrite, and its chemical formula is NaNO 2 , is a potential carcinogen mainly found in food, medicine, agriculture and biological samples. Sodium nitrite is not only deliquescent, but also soluble in water and liquid ammonia, and easily converted into sodium nitrate when exposed to air. Sodium nitrite is a strong oxidant and also has reducing properties; sodium nitrite has a salty taste, and is often used by unscrupulous people to make fake table salt or as a substitute for table salt in illegal food production. High levels of nitrite can cause great harm to health and disrupt the balance of the ecosystem. Therefore, the development of rapid and highly sensitive detection ...

Claims

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